Missing data about the morphological and histological structure of the liver in young homing pigeons and cattle egrets led us to design this research. Generally, the liver in young homing pigeons differs from the liver of Ibis anatomically, histologically, and histochemical, whereas the young homing pigeon, both lobes of liver connected by interlobar portion. Bile secretion of the liver poured into the first part of the duodenum through the hepatic duct, without the gall bladder. While in Cattle Egret has a gall bladder. On the basis of the above findings, it can be concluded that the presence of gall bladder and absence of it and habit of feeding significantly affected the gross and histological structure of the liver.